3. Japan: Don't tip.

via morgueFile.com

If you're used to ordering out and deciding if you should leave a 15 percent or 20 percent tip, you don't have to worry about that in Japan because it is considered extremely impolite to tip. This includes restaurants, cabs and more. Save your money in Japan.

9. China: Don't greet someone by their first name.

via morgueFile.com

When you addressing someone in China, it is rude to say their first name first. Calling someone with their last name first is the proper way to address someone in China because of the importance of family heritage.